Best known as the acerbic Sister Michael in Channel 4's Derry Girls, the Irish actor is set to take on another comic role in Rory Mullarkey's Pity at the Royal CourtSiobhan McSweeney was born in County Cork, Ireland, and studied at the Royal Central School of Speech and Drama in London, where she currently lives. Her career began on the stage " she has appeared in five National Theatre productions and most recently p…
